Chromium-52

Properties and data of the isotope ⁵²Cr.

Contents

See also: List of individual Chromium isotopes (and general data sources).

General data

Name of the isotope:Chromium-52; Cr-52Symbol:⁵²Cr or 5224CrMass number A:52 (= number of nucleons)Atomic number Z:24 (= number of protons)Neutrons N:28Nucleon pairing (Z - N):even - evenNuclear ratio (N/Z ratio):1.1666666666667 (= neutron-proton ratio)Neutron excess (N-Z):4Isotopic mass:51.940506(4) u (atomic weight of Chromium-52)Nuclide mass:51.9273404 u (calculated nuclear mass without electrons)Mass excess:-55.4183 MeVMass defect:0.489912416 u (per nucleus)Nuclear binding energy:456.35047603 MeV (per nucleus)
8.77597069 MeV (average binding energy per nucleon)Separation energy:S_N = 12.0392(5) MeV (first neutron)
S_P = 10.5044(5) MeV (first proton)Half-life:stableSpin and parity:
(nuclear angular momentum)0+Charge radius:3.6452(42) femtometer fmMirror nucleus:Nickel-52Year of discovery:1923

Parent Nuclides

Direct parent isotopes are: ⁵²Mn, ⁵²V.

Occurrence

Comparison of the natural Chromium isotopes including isotopic abundance (mole fraction of the isotope mixture in percent):

	Atomic Mass m_a	Quantity	Half-life	Spin
Chromium Isotopic mixture	51.9961 u	100 %
Isotope ⁵⁰Cr	49.9460414(5) u	4.345(13) %	1.3 × 10¹⁸ a	0+
Isotope ⁵²Cr	51.940506(4) u	83.789(18) %	stable	0+
Isotope ⁵⁴Cr	53.938879(4) u	2.365(7) %	stable	0+
Isotope ⁵³Cr	52.94064630(12) u	9.501(17) %	stable	3/2-

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 28) and isobaric (same nucleon number A = 52) with Chromium-52. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 28	Isobar A = 52
11	³⁹Na
12	⁴⁰Mg
13	⁴¹Al
14	⁴²Si
15	⁴³P
16	⁴⁴S
17	⁴⁵Cl	⁵²Cl
18	⁴⁶Ar	⁵²Ar
19	⁴⁷K	⁵²K
20	⁴⁸Ca	⁵²Ca
21	⁴⁹Sc	⁵²Sc
22	⁵⁰Ti	⁵²Ti
23	⁵¹V	⁵²V
24	⁵²Cr	⁵²Cr
25	⁵³Mn	⁵²Mn
26	⁵⁴Fe	⁵²Fe
27	⁵⁵Co	⁵²Co
28	⁵⁶Ni	⁵²Ni
29	⁵⁷Cu
30	⁵⁸Zn
31	⁵⁹Ga
32	⁶⁰Ge